Tutorial fiber-to-the-x: Technologies & economics

¢ FTTN-VDSL2: â-ª Technology of choice in overbuild distribution provided loop lengths can be managed â-ª Ideal in multi-dwelling overbuild situations where CAT5 does not exist or cannot reach â-ª In overbuild : up to 50% cheaper than all other alternatives • Key advantage versus FTTN/B Active Ethernet • This advantage is negated in Greenfield situations (new facilities) ➢ FTTU-GPON: â-ª Technology of choice in Greenfield distribution of 100Mb/s to single family residences â-ª Advantages because of line rate, passive OSP, no-power, low-cost multiplexing deep into distribution network â-ª Has financial edge in greenfield SFR applications due to speed and distribution gain â-ª 2.5Gb/s doubles capacity of 1.25Gb/s solution (EPON) â-ª Splitting 2.5Gb/s in distribution is 32 times more efficient than dedicating single fibers to each user (P2P is no option) ➢ Active Ethernet: • Falls in-between • Too expensive compared with FTTN-DSL in overbuild • Less performing than GPON for greenfield